Spindle for milling-machines and lathes.



L. H. conmnza. SPINDLE FOR MILLING MACHINES AND LATHE}.

APPLICATION FILED OCT. 10, 1916.

LEO H. 003111 213, or BROOKLYN, NEW YORK.

SPINDLE FOR MILLING-MACHINES AND IiATHESr Application filed October 10, 1916. Serial No. 121,894.

To all whom it may concern:

Be it known that I, LEO H. CORMIER, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Spindles for Milling-Machines and Lathes, of which the following is a specification.

The present invention relates to milling machines and lathes, and refers particularly to a novel spindle or shaft construction for mounting the milling cutter, and for holding small work tobe turned in close proximity to the tool post.

An object of the present invention is to provide a spindle construction which will permit of the grinding of valves, and the truing of bores in a quick and economical manner, and which will greatly facilitate the use of the lathe for all of its ordinary uses.

It is the further aim of the present inven tion to provide a spindle possessing the above characteristics, and which will not alter the construction or arrangement of the other parts of the lathe; which will. not in terfere with an of the adjustments of the same; and whic may be readily applied to lathes now in use.

Other objects and advantages of this vention, as well as the above, will be pointed out more clearly in the following detailed description of the present preferred embodiment of this invention, thesame being disclosed in the accompanying drawings wherein:

Figure 1 is a longitudinal central sectional View taken through the head-stockofa milling machine or lathe, and showing the spindle ofthis invention applied thereto. I

'Fig. 2 is a transverse section taken on the line 2-2 of Fig. 1, and'looking in the direction of the arrows indicated.

Fig. 3 is a fragmentary sectional viewof the outerend of the spindle showing a piece of stock mounted thereon and adapted to be turned down.

Referring to this drawing, 10 designates the bearing or post of the head stock ofa lathe in which a hollow horizontal shaft 11 ismounted to turn. The shaft 11 is driven in the usual manner by a pulley'12 havinga graduated peripheral surface for receiving a drive belt, not shown. The inner end of the shaft 11 may be supported in any suitable bearing, preferably by the bearing Specification of Letters Patent.

matted Apr. 17, 1917.

shown in Fig. l, and which is described and 'set forth in detail in my co-pending'application Serial Number 124,895 filed of even date herewith. In general, the bearing comprises an'intermediate roller 13 about which are arranged a plurality of pinions or small rollers 14: whiclilatter have bearings in a casing -15'which is suitably secured to the post 10. The inner end of the shaft 11 extends beyond the bearing and is provided with the usual f rce plate 16, the latter being preferably thre Lded upon the end of the shaft.

A' spindle 17 is telescoped into the shaft 11 and is'provi led in its periphery with a plurality of longitudinally extending grooves 18. Collars 19 are fitted in the shaft 11 and are provided in their inner walls with transversely extendir g ribs adapted to fit in the grooves 18 of the spindle. The collars 19 are held from timing, and from longitudinal displacement in the shaft 11 by means of set screws 20 which are threaded through the sides of the shaft 11, and which engage in the collars 1.9. The collars are placed preferably toward the opposite ends of the shaft 11 so as to support the spindle and cause the latter to turn with the shaft.

The spindle l7 is adapted to be shifted longitudinally iii the shaft 11, and the means for accomplishing this result is an elongated screw rod 21 which is threaded through the outer closed end. 22 of the shaft. The inner end of the rod 21 is provided with a head 23 seated ina recess 2 1 at the outer end of the spindle 17. Y A plate 25 is detachably secured upon the outer} end of the spindle and receives the adjacent end of the screw rod 21 therethrough, the rod turning freely through the plate. In this manner, the screw rod 21 is swiveled uponthe end of the spindle. A hand'wheel 25 is mounted on the outer end of the "screw rod 21 and is preferably of hollow construction. A handle 27 is pivoted in one side of the Wheel 25 and is normally held by a spring 28 within the wheel out of the way. Thei wheel 26 is also provided with a flange 2S1 which overlaps the adjacent end of the shaft 11 and slides thereon for housing and protecting the outer end of the screw rod 21.. set screw 30 is threaded through one side of the shaft 11 adjacent to the inner end fthereof, and is adapted to engage in recesses 31 in the side of the spindle 17 to hold thelatter when adjusted. The inner end of the spindle 17 is provided cenon. By using this plug or center 32 the spindle 17 may be retracted by turning the threaded rod v21 to bind the milling cutter 34 against the face plate 16. The milling cutter may now be strapped or otherwise suitably secured to the face plate, and the spindle 17 further retracted out of engagement with the milling cutter.

As shown in 3, the center or plug 32 may be provided with a solid "outer end externally threaded for the reception of a nut, or other piece of stock thereon. In this instance, the plug 32 is provided with an angularly faced head upon its outer end, as indicated at 35, by means of which the plug may be turned into tight engagement with the spindle 17.. The nut, indicated at 36, is preferably spaced from the adjacent face of the plate 16 by means of a loose bushing 37 which surrounds the plug or center 32 and is adapted to be bound against the face plate 16 by retracting the spindle 17. In this manner, the nut 36 is held rigidly in position and when the shaft 11 is turned the nut is rotated so that it may be worked upon in the usual manner, the nut being supported adjacent to the tool post.

When a chuck, or the like, is secured against the face plate 16., and the plug 32 is not required, the screw rod may be rotated to retract the spindle 1'7 and draw the lug 3.2 into the shaft 11 out of the way. he "spindle 17 is adapted to have approximately a six-inch sliding movement so as accommodate the,spindle and the shaft to all of the various uses required in the operation of the lathe. It is preferable to locate the inner collar 19 at least one inch out of the plane of the bearing which supports the shaft 11 so that the hearing may freely expand andcontract.

It is of course understood that the parts of this device as above specifically described may be changed as to dimensions and form to suit varying conditions of lathes, without departing from the spirit of the invention, such chan es and modifications being restricted only by the scope of the following claims. v

I claim:

1. In a lathe, the combination of a hollow shaft provided with a face plate upon its inner end, a spindle slidably mounted in said hollow shaft and adapted to turn therewith,

a tool or work-supporting plug detachably mounted in the inner end of the-spindle and adapted to be projected beyond the shaft and to be withdrawn into the shaft, and means carried by the shaft for shifting said spindle therein.

2. In a lathe, the combination of a hollow shaft, a face plate arranged at one end of the shaft, a spindle slidably mounted in said hollow shaft and adapted to turn "therewith, a tool or work-supporting plug detachably mounted upon the inner end of the spindle and adapted to :be projected beyond the shaft and through the face plate to receive the work and to be withdrawn into the shaft for binding the work against the face plate, and operating means connected to the spindie for shifting the same.

3. In a lathe, the combination of a hollow shaft, a face plate mounted upon end of the shaft, a spindle to longitudinally in the shaft and to turn therewith, a detachablecenter mounted upon the inner end of the spindle and adapted to be projected thereby beyond the end of the shaft for supporting the work, a screw nod threaded through the outer end of said shaft and havin swivel connection with the adjacent end of said spindle, and means on the outer end of said rod for turning the same to retract the spindle and bind the work the face plate.

4. In a lathe, the combination of a' hollow shaft having a face plate upon its inner end, a work supporting spindle mounted in the shaft adapted for longitudinal movement therein and adapted to turn therewith, means for shifting the spindle longitudinally in the shaft to bind the work against the face plate, and a set screw carried by the shaft for engagement with the spindle .to lock the same in adjusted position.

5. In a lathe, the combination of a hollow shaft having a face plate thereon, a collar fitted in said shaft and secured thereto, said collar being provided with an internal trans versely extending rib, a spindle fitting in said shaft provided. with a longitudinally extending groove in its periphery for the reception of said rib whereby said spindle is permitted to move longitudinally in the shaft and is held for rotation therewith, and a tool or work support mounted on the projecting end of the spindle to bind the wor'k against the face the spindle.

6. In a lathe, the combination of a hollow shaft having a face plate, .a spindle mounted in the shaft and provided with longitudi nally extending grooves in its periphery, collars secured in the shaft provided with internal transversely extending ribs adapted to on go in said grooves and hold the spindle or rotation with the shaft, adjust ing means mounted on the outer end of the shaft and engaging the spindle to shift the same longitudinally, and a center carried upon theinner end of the said spindle for plate upon the retraction of and having swivel connection with the adjacent end of said spindle, a hollow wheel mounted on the outer end of said screw rod a handle pivotally mounted in one side of 15 the wheel and :fidapted to be swung outwardly for engagement by the hand to turn the wheel and adjust the spindle, and a spring carried by the wheel and engaging said handle to normally retract the same.

LEO H. CORMIER.

Copies 01' this patent may be obtained for five cents each, by addresslngjthe Commissioner of Patentl;

' Washington, D. 0." 

